1/*
2 * Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/types.h>
31#include <sys/ucontext.h>
32#include <errno.h>
33#include <stdlib.h>
34
35int
36__getcontextx_size(void)
37{
38
39	return (sizeof(ucontext_t));
40}
41
42int
43__fillcontextx2(char *ctx)
44{
45
46	return (0);
47}
48
49int
50__fillcontextx(char *ctx)
51{
52	ucontext_t *ucp;
53
54	ucp = (ucontext_t *)ctx;
55	return (getcontext(ucp));
56}
57
58__weak_reference(__getcontextx, getcontextx);
59
60ucontext_t *
61__getcontextx(void)
62{
63	char *ctx;
64	int error;
65
66	ctx = malloc(__getcontextx_size());
67	if (ctx == NULL)
68		return (NULL);
69	if (__fillcontextx(ctx) == -1) {
70		error = errno;
71		free(ctx);
72		errno = error;
73		return (NULL);
74	}
75	return ((ucontext_t *)ctx);
76}
77